Check out Stacey Huang's story, "Fighting Imposter Syndrome and Finding My Confidence at Princeton."
"I wish I could say I’ve completely overcome my self-doubts. I still wrestle with these invasive thoughts that “I’m not smart enough”— thoughts that I recognize are useless, but sometimes your mind gets stuck on things that don’t matter. Nevertheless, engaging in research has helped me develop a realistic sense of my abilities and limitations. And having found that niche, I’ve come to think that perhaps President Tilghman was right: maybe I do belong at Princeton, after all."